Definition of teratocarcinoma in English:

noun (plural teratocarcinomata-mətə or teratocarcinomas)

Well they are in the States, they've actually been able to produce these nerve cells from a carcinoma, a teratocarcinoma, and then these nerve cells remain nerve cells, they don't actually change into anything else.

The clearest examples are teratocarcinomas, solid tumors that spontaneously arise from germ cells.